Switch.



C. S. EPPLEY.

SWITCH.

APPLICATION FILED NOV. 24, 1915.

Patented Nov. 14, 1916.-

2 SHEETS-SHEET I- UNIT mars PATENT trio.

CHARLES S. EPPLEY, OF YORK, PENNSYLVANIA, ASSIGNOR TO SELF-ACTING SVTITGH 00., A CORPORA'IIGN OF DELAWARE.

swrrcn.

Specification of Letters Patent.

Patented Nov. 1%, 1916.

Application filed November 24, 1915. Serial No. 63,246;

T 0 all whom it may concern Be it known that 1, CHARLES S. EPPLEY, a citizen of the United States, residing at York, in the county of York, State of Pennsylvania, have invented a new and useful Switch; and I do hereby declare the follow ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a switch, and particularly to an improved operating mechanism therefor.

An object of the invention is to provide an improved operating mechanism which is strictly positive in operation. In other words, the difi'erent parts or elements of the mechanism cooperate positively.

Another object of the invention is to so arrange and construct the various parts or elements, to insure their full requisite movements or actions, and yet prevent overthrow or movements of the parts.

Another object of the invention is to provide means, adapted to be operated by a member on a car coming in contact with a device in its path, to actuate a mechanism, which includes an eccentric for throwing the switch point to one position, at which time a member of the second means actuates an element, which in turn releases a clutch in the first means, to permit the operating parts of the first means to return to their initial position, and restore the device in the path of a member of the next car.

Another object of the invention is to provide means in the means which includes said eccentric, to prevent the parts of the means with the eccentric from overthrowing, and retrograding.

Another object of the invention is to providea dust and waterproof casing for the operating mechanism, and one which has its top suitably packed, in order that the casing may be filled practically with lubricant, so that the parts and elements of the mechanism. will operate in the oil, to insure lubrication for the parts, and which lubricant maybe replenished substantially about every switch point) which tubular casing connects to a second dust and waterproof casing for the yieldable connection, said casing for the yieldable connections being designed to contain lubricant, as well as the tubular casing, to keep the parts lubricated.

Another object of the invention is to provide means to automatically throw the device from the path of the tripping member on the car.

Another object of the invention is to improve and render more eflicient and practical the switch. operating mechanism described, shown in the drawing, and claimed in the application of C. S. Eppley, filed Feb. 23, 1915, Serial No. 9,913, which has matured into Patent No. 1,165,236, dated 21st day of December, 1915.

' In practical fields the details of construction may necessitate alterations, falling within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings: Figure 1 is a view in perspectiveof the improved switch operating mechanism, as applied to a switch. Fig. 2 is a plan view of the casing for the switch operating mechanism, showing the cover of the casing removed to show the operating parts of the mechanism. Fig. 3 is a sectional view on line 33 of Fig. 2. Fig. 41 is a sectional view on line 4- 1 of Fig. 2. Fig. 5 is a sectional view on line 5-5 of Fig. 2. Fig. 6 is a sectional view on line 66 of Fig. 4. Fig. 7 is a sectional view on line 77 of Fig. 2. Fig. 8 is a plan view of the casing for the connection between the eccentric rod and the switch point, showing the cover of said casing removed to disclose said connections in plan. Fig. 9 is a sectional view on line 9-9 of Fig. 6.

Referring more especially to the drawings, 1 and 2 designate the main rails of a track, the main rail 2 merging into the siding or switch rail 3, between which siding or switch rail and the main rail 4 is a switch point 5 pivoted at 6. Adjacent the side of the siding or switch rail is a casing 7 having a cover 8, which is secured at 9 to the casing, there being a suitahle packing 10, to insure that the casing will be dust and waterproof. A tubular casing 11 has its flange 13 secured to one side (f the casing 7 as shown at 14, the other end of the tubular casing 11 has its flange 15 secured at 16 to the casing 17, which incloses the switch operating mechanism."

The casing 17 is provided with a partition wall 18 which divides the easing into two compartments 19 and 20 and a cover. 21 is provided for the casing, there being a suitable packing 22, to prevent dust and water from entering. The cover consists of two sections 23 and 21, which have flanges 25 to overhang the side walls of the casing. The section 23 covers the compartment 20 while the section 2% covers the compartment 19. To make a tight fit with the packing screws 26 are threaded through the cover.

and into the sides of the casing. The inner face of the side wall 27 of the casing is provided with flanges 28, 29, and 30, and the inner face of the partition 18 is provided with flanges 31, 32 and 33.. A one piece bearing member 34 is bolted at 35 to the flanges 28 and 29, and a second one piece bearing 36 is bolted at 37 to the flanges 31 tion wall 18.

and 32. A shaft 38 is mounted in the bearings 3a and 36 and secured at 39 to one end of the shaft 38 is a collar 10 having a laterally extending arm 11, to which a link 12 is connected at 43 for rocking the shaft 38. The arm =11 and the link 12 operate in the compartment 20. A packing gland consisting of the two parts 44 and 45 for one prevent axial movement of theeccentric a collar 53 is secured to the shaft 38 by means of the set screw 54. A gear 55 is mounted loosely upon the shaft 38, and is in mesh with the gear 56 on the shaft 57. The gear 55 has a laterally extending. collar 58 provided with clutch teeth 59. A clutch collar 60 is keyed at61 to rotate with the shaft 38, but is capable of sliding'on said shaft,

and when moved toward the collar 58, the teeth 62 of the collar 60 coijperate with the teeth 59, so as to cause the gear 55 to rotate with the shaft 38. A spring 64 is interposed between the clutch collar 60 and the collar' so as to hold the collar 60 in clutch with the collar 58. The clutch collar 60 is provided with an annular groove 65, one wall of which diametrically opposite sldes of the collar is provided with recesses 66 hav ing cam surfaces 67. The shaft 57 is mounted in the one piece bearings 68 and 69, which are bolted respectively at 70 and 71' to the flanges 32 and 33, and 29 and 30. Made fast upon the shaft 57 by means of the key or feather 73 is a ratchet disk 74. Rising upwardly from the flange 33 is a lug 75, to which a pawl 76 is pivoted by means of the bolt 77, there being a spring 78 to hold the pawl 76 in engagement with theratchet to prevent retrograde movement of the ratchet and the shaft 57. Also keyed by the feather 73 on the shaft 57 is a disk 79 having diametrically opposite shoulders 80 and 81, al-

the interior of the casing 7 is a bell'crank lever 94:, the long arm 95of which has an opening 96 or slot, through which the rod 89 extends, there being coilsprings 97 and 98 adjacent the opposite faces of the arm 95. The nuts 99 and 100 hold the springs 97 and 98 so as to bear yieldably against the opposite faces of the arm 95. The short arm 101 is provided with a slot and pin connection 102 with the rod 105, which is mounted in a fluid and dust tight bearing 106 of one side of the casing 7. Therod 105 is in turn connected to the switch point 5. Also keyed by the'feather 73 to the shaft 57 is a disk or collar 107 having an annular flange 108, which is provided with diametrically opposite cam portions or surfaces 109 and 110. Pivoted to a post 112, which rises upwardly from the base of the casing 17, is a lever 113, which, upon one side of the pivot, is formed with thearms 114:, which arch substantially halfway about the clutch collar 60, so that the diametrically opposite pins 115 will play in theannular groove 65 of the clutch collar 60. The other end of the lever 113 is notched as shown at 116 to cooperate with the flange 108 and its diametrillO callyopposite cam surfaces 109 and 110, so thatthe lever 113 will be'oscillated horizon tally during the rotation of the shaft 57. The gear 56 is'made fast to the shaft 57 by means of a key or feather 117. A slide 118 upon its under face is provided with a dovetailed rib 119, which is dove-tailed'in the groove or .guide 120, and in'the bottom of the guide 120 a slot 121 is formed, and pro- Mounted to move vertically in an opening 123 of the slide 118-.is1a plate or bar 124,

Riveted at 125 to the slide and extending downwardly into the compartment 20 is a bracketarm 126, between the 127 of which is also mounted in the guideslot 121.

which and the bar or plate 124 a coil spring 128 is interposed, so as to hold the bar or plate 124 in its uppermost position, with the opposite ends of the pin 129 against the under surface of the section 43 of the cover. The bifurcated end 130 of the link 42 is pivoted at 131 to the lug 132 of the bracket 126. The bar or plate projects above the slide 118, and isin close position to one side of the main rail 2, so that a member 134 (which may be carried by a car moving in the direction of the arrow 5 in Fig. 1) may contact with the pro jecting part of the bar or plate 124. Owing to the bar or plate 124 closely but slidably fitting the opening 123, the slide 118 will be moved forwardly, in which case owing to the link connection 42, the shaft 38 will be rocked in the direction of the arrow 0.

Owing to the gear 55 being in clutch with the shaft 38, the shaft 57 will be partially rotated, for instance, substantially one half revolution, by the gear 55 and the gear 56. Just as soon as the shaft 38 starts rotating the eccentric 51 will move so as to lower the dog 83, so that its free end will engage the surface following the shoulder 80, the disk 79 having moved a trifle past the free end of the dog 83, in which case the shaft 57 will rotate through the medium of the gears 55 and 56. While the shafts 38 and 57 are rotated as indicated by the arrows in Fig. 2, the lever 113 will oscillate idly. In other words, the pins 115 will ride the cam surfaces 67 of the diametrically opposite recesses 66, while the notched end 116 will ride from engagement with the cam surface 109 of the flange 108 of the disk or collar 107. It is to be noted that the shaft 38 will make substantially one third revolution to substantially one half revolution of the shaft 57, and therefore the cam surface will reach the notched end 116 of the lever 113, before the diametrically opposite recesses 66 again reach the diametrically opposite pins 115, in which case the clutch collar 60 will be moved toward the collar 53, disengaging the teeth 59 and 62, and owing to the gear 55 being loose upon the shaft 38 the shaft 38 is free to return to its initial position. However, the shaft 38 is rocked against the action of the spring 49. When the shaft 57 is rotating, the eccentric rod 89 is reciprocated in the direction of the arrow 03 in Fig. 2, and also in Fig. 8, in which case the bell crank lever 94 is oscillated upon its pivot, to throw the switch point toward and against the main rail 4 as in Fig. 1, thereby permitting the car to pass on to the siding or switch rail 3. As before stated, every time the switch point is moved in one direction or the other, the shaft 57 makes one-half revolution, and is limited positively to this revolution by the dog 83 being released from its elevating position, so that its end 82 will contact with the shoulder 81 of the disk 79. When the shaft 38 completes its one third revolution, the bar or plate has been moved downwardly by the opposite ends of the pin 129 riding upon the cams 122, so as to withdraw the bar or plate 124 from the path of the member 134. The clutch members 58 and 60 are disengaged at the same time the bar or plate 124 is withdrawn from the path of the member 134, so that by the action of the spring 49, the shaft 38 is returned to its initial position. lVhen the shaft 38 reaches its initial position, the cam 51 will raise the dog 83 sufliciently, so that its free end 82 is offset a little above the shoulder 81, so that when the shafts 38 and 57 are again rotated toward each other, the disk or member 7 9 will have moved sufliciently,

to permit the dog? 83 to ride upon the surface of the disk 9 following the shoulder 81. WVhen the shaft 38 is returned to its initial position, the pins will again engage the diametrically opposite recesses 66,

in which case the clutch collar or member 60 will again be thrown in clutch with the collar 58. l/Vhen the shaft is returned to its initial position the slide 118 is also returned. When the shaft 57 is again rotated, the eccentric will be returned to the position shown in Fig. 2, thereby returning the switch point to the position shown in Fig. 8. The shaft 57 rotates in the same direction, but intermittently. When a car is moving in a direction opposite to that indicated by the arrow 5 in Fig. 1, either moving on the main rail, or from the switch rails to the main rails, and the switch point 'is in contact with the main or switch rail,

cluding an intermittently revoluble shaft having an eccentric and rod connection with the switch point, means including a rocking shaft in gear with said first shaft, a device adapted to be actuated by a member on the car and being connected to the rock shaft for rocking the same one third of a revolution to substantially one half of a revolution of the first shaft, means connecting the two shafts and means whereby as the rocking shaft completes its one third revolution, the rocking shaft is thrown out of gear with the revoluble shaft, and means for returning the rocking shaft to its initial position.

2. In combination with a switch including a'switch point, an operating mechanism includlng an mtermittently revoluble shaft havlng an eccentrlc and rod connection with the switchpoint, means including a rocking shaft in gear with said first shaft, a device adapted tobe actuatedby a-member on the car and being connected tozthe rocking shaft for rocking the'same one third of a revolutionto substantially one half of a revolution of thefirst shaft, means connecting the two shafts and means whereby as .the rocking shaft completes its one third revolution, the rocking shaft is thrown out of gear with the revoluble shaft, and means for returning the rocking shaft to its initial position, and means for withdrawing the device from the path of the member on the carto permit the rocking shaft to return to its initial position.

3. In combination, a switch having a switch point, an intermittently revoluble shaft having connections with the point, a rocking shaft, a gear loosely mounted thereon and having gear connections with the first shaft, a clutching member keyed to the rocking shaft and having clutch connections with the loose gear, a device adapted to be actuated by a member on a car and being connectedto the rocking shaft, connections between the intermittent revoluble shaft and the clutch member, whereby upon the completion of a half revolution of the intermittent shaft, the clutch member is oscillated to throw the rocking shaft out of clutch with its gear, to permit the rocking shaft to turn to its initial position.

i. In combination, a switch having a switch point, a dust and water proof casing, an intermittently revoluble shaft mounted in the casing and having connections with the point, a rocking shaft mounted in the casing, a gear'loose upon the rocking shaft and having gear connections with the first shaft, a clutch member keyed to the rocking shaft and having clutch connections with the loose gear, a device adapted to be actuated by a member on a car and being connected to the rocking shaft, connections betWeenthe intermittent revoluble shaft and the clutch member to throw the rocking shaft out of clutch with its gear upon the completion of a half revolution of the intermittently revoluble shaft, and means to return the rocking shaft and said device to :their initial positions.

5. In combination, a switch having a switchpoint, a casing, an intermittently revoluble shaft mounted in the casing and having connections with the point, a rocking shaft mounted in the casing, a gear loose upon the rocking shaft and having gear connections with the first shaft, a clutch member keyed to the rocking shaft andhaving clutch connections with the loose gear, 1

la. device adapted. to be actuated-byarmember tial position.

:gear,-saic1, clutchinclndingdiametrically opon a. car andbeing connected-to the rocking shaft, connections between the intermittently revoluble shaft and the clutch member tothrow the rocking shaft out of clutch with its gear upon the completion of a half revolution of the intermittently revoluble shaft, and means to return the rocking shaft and said device to their initial positions, and means to prevent retrogression of the intermittently revoluble shaft.

6. In combination, a switch having a switch point, a casing, an intermittently revoluble shaft mounted in the casing and having connections with the point, a rocking shaft mounted in the casing, a gear loose upon the rocking shaft and having gear connections with the first shaft, a clutch member keyed to the rocking shaft and having clutch connections with the loose gear, a device adapted to be actuated by a mem- I her on a car and being connected to the rocking shaft, connections between the intermittently revoluble shaft and the clutch member to throw the rocking shaft out of clutch with its gear upon the'completion of a half revolution of the intermittently revoluble shaft, and means to return the rocking shaft andsaid device to their initial positions, and means to prevent retrogression of the intermittently revoluble shaft, and means to prevent an overthrow of the intermittent revoluble shaft.

7 In combination, a switch having a switch point, a casing, an operating mecha nism in said casing, and comprising a pair of shafts, one being rockable asubstantially third revolution to substantially one half intermittent revolution of the other shaft,

the intermittently revoluble shaft having an V eccentric and rod connection with the switch;

Joint a ear loose on the rockin shaft and shaft, a device to be actuated by a member on a car and being connectedto the rocking shaft, and means cooperating between the cam and the recesses of the clutch member to throw the clutchupon the completion of i half revolution of the intermittent shaft to allow the rocking shaft to return to its ini- 8.' In: combination, a switch having a switch point, a-casingyan operating mecha nism in said casing, and comprising apair of shafts, one being rockable a substantially third revolution to substantially one half intermittent revolution of the'otherj. shaft, the intermittently revoluble-shaft having an eccentric and rod connection with the switch point, a gear loose on the rockable shaft and to the rocking shaft andin clutch with its in gear with the other shaft, a clutch'keyed posite recesses, a cam on the intermittent shaft, a device to be actuated by a member on a car and being connected to the rocking shaft, and means cooperating between the cam and the recesses of the clutch member to throw the clutch upon the completion of a half revolution of the intermittent shaft to allow the rocking shaft to return to its initial position, and means for returning the rocking shaft to its initial position.

9. In combination, a switch having a switch point, a casing, an operating mechanism in said casing, and comprising a pair of shafts, one being rockable a substantially third revolution to substantially one half intermittent revolution of the other shaft, the intermittently revoluble shaft having an eccentric and rod connection with the switch point, a gear loose on the rocking shaft and in gear with the other shaft, a clutch keyed to the rocking shaft and in clutch with its gear, said clutch including diametrically opposite recesses, a cam on the intermittent shaft, a device to be actuated by a member on a car and being connected to the rocking shaft, and means cooperating between the cam and the recesses of the clutch member to throw the clutch upon the completion of a half revolution of the intermittent shaft to allow the rocking shaft to return to its initial position, and means for returning the rocking shaft to its initial position, and means to withdraw the device from the path of the member on the car to allow the rocking shaft to return to its-initial position.

10.. In combination, a switch having a switch point, a casing, an operating mechanism in said casing, and comprising a pair of shafts, one being rockable a substantially third revolution to substantially one half intermittent revolution of the other shaft, the intermittently revoluble shaft having an eccentric and rod connection with the switch point, a gear loose on the rocking shaft and in gear with the other shaft, a clutch keyed to the rocking shaft and in clutch with the gear, said clutch including diametrically opposite recesses, a cam on the intermittent shaft, a device to be actuated by a member on a car and being connected to the rocking shaft, and means cooperating between the cam and the recesses of the clutch member to throw the clutch upon the completion of a half revolution of the intermittent shaft to allow the rocking shaft to return to its initial position, and means for returning the rocking shaft to its initial position, means to prevent retrogression of the intermittent shaft, and means to prevent an overthrow of the intermittent shaft.

11. In combination, a switch having a switch point, a casing, an intermittently revoluble shaft mounted in said casing having connections with the switch point, a device actuated by a member on a car having connections with said shaft, said connections including a pair of gears, and means actuated by the intermittent shaft upon the completion of a half revolution of said shaft to temporarily sever said connections to permit the device to be withdrawn from the path of said member.

12. In combination, a switch having a switch point, a casing, an intermittently revoluble shaft mounted in said casing, means connecting said shaft with the switch point, a device actuated by a member on a car having connections with said shaft, and means actuated by the intermittent shaft upon the completion of a half revolution of said shaft to temporarily render said first mentioned means incapable of further rotating said shaft, means to withdraw the device from the path of said member, and means to restore said first means to their initial position.

13. In combination, a switch having a switch point, a casing, an intermittently revoluble shaft mounted in said casing, means connecting said shaft with the switch point, a device actuated by a member on a car having connections with said shaft, and means actuated by the intermittent shaft upon the completion of a half revolution of said shaft to temporarily render said first mentioned means incapable of further rotating said shaft, means to withdraw the device from the path of said member, and means to restore said first mentioned means to their initial position, and means to prevent backward movement of said shaft.

14. In combination, a switch having a switch point, a casing, an intermittently revoluble shaft mounted in said casing, means connecting said shaft with the switch point, a device actuated by a member on a car having connections with said shaft, and means actuated by the intermittent shaft upon the completion of a half revolution of said shaft to temporarily render said first mentioned means incapable of further rotating said shaft, means to withdraw the device from the path of said member, and means to restore said first means to their initial positions, and means to prevent backward movement of said shaft, and means to prevent an overthrow of said shaft.

15. In combination, a switch having a switch point, a casing, a revoluble shaft mounted in said casing having an eccentric and rod connection with the switch point, a device to be actuated by a member on a car, means including a pair of inter-meshing gears connecting said device and said shaft to operate the shaft a half revolution, a clutch in said means, a cam on said shaft, and means actuated by said cam to operate the clutch upon the completion of the half a clutch having one of its members geared to said shaft, a device to be actuated by a memberon a car, means connecting said device and the other member of said clutch to operate the shaft a half revolution, a cam on said shaft, and means actuated by said cam to operate the clutch upon the completion of the half revolution of the shaft,

to render the first means incapable of op--v erating the shaft more than a half turn, and

means to return the first means to its initial position when rendered incapable. 17. In colnblnatlon, a switch having a switch point, a cas1ng,'a IGVOlllblQ shaft mounted in said casing having an eccentric and rod connection with the switch point, a clutch having one of its members geared to said shaft, a deviceto be actuated by a mem ber on a car, means connecting said device and-the other member of said clutch, an element on said shaft, means actuated by said element to open the clutch when the shaft will have made asubstantially half revolution, to render the first means incapable of operating the shaft further, and means to re turn the first means to its initial position. 18. In combination, a switch having a switch 'point, a casing, a revoluble shaft mounted in said casing having an eccentric and rod connection with the switch point, a clutch connected to. said shaft, a device to be actuated by amember on a'car, means connecting said device and said clutch, an element onsaid shaft, means actuated by said element to open the clutch when the shaft will have made a substantially half revolution, to render the first means incapable of operating the shaft further, and means to return the first means to its initial position, and means to withdraw the device from the path of said member on the car.

19. In combination, a switch having a switch point, a casing, a revoluble shaft mounted in said casing havingan eccentric and rod connection with the switch point, a clutch comprising two members, gears connectingone of the members of the. clutch and said shaft, a device to be actuated by a member on a car, means connecting said device and the'other member of the clutch, an element on saidshaft, means actuated by said element to separate the members of the clutch whenthe shaft will have made a substantially half revolution, to render the first means incapable of operating the shaft fun ther, and means to return the first means to its 1n1t1al posltlon, and means to w1thdraw the device from the path of said member on the car,and means to prevent retrogression' of said shaft. r Y

20. In combination, a switch having a switch point, a casing, a revoluble shaft mounted in said casinghaving an eccentric and rod connection'with the switch point, a

. clutch connected to said shaft, a device to be actuated by'a member on a car, means connecting said device and said clutch, an element on said shaft, means actuated by said element to open the clutch when theshaft will have made a substantially hal-frevolution, to render the first means incapable of operating the shaft further, and means to 1 return the first meanstoitsinitial position,

and means to withdraw the deviceifrom the path of sald member on the car, and, means to prevent an overthrow-of said shaft.

21. In combination, a switch having a switch point, a casing, a ,revolubleshaft mounted in said casing having an eccentric.

and rod connection with the switch point, a clutch connected to said shaft, a device to be actuated by amelnber on a. car,means connecting said deviceand said "clutch, an

element on said shaft,;means*actuated by said element to open the clutch when the shaft will have made asubstantially half revolution, to render-the first means incapable of operating the shaft further, and

means to return the first means to its initial: 7

position, and means to withdraw the device from the-path ofsaidmember on the car,

a second element on said shaft, a cam op-.

erable with the first means, and means normally supported'by the cam and allowed to gravitate'to cooperate with the second element to prevent an overthrow of the shaft." V

7 522. In combination," a switch having a switch point, arasmg, a revoluble shaft mounted in said casing h'avin'g'an eccentric and rod connection with the switchtpo'int, a

clutch comprisingtwo members, gears connecting one of the niembers of the clutch.

and said shaft, a device'to be actuated by a member on'a car, means includinga pair of intermeshing gears connecting'said device and the other-members "ofthe clutch, an

element on said shaft, means actuated by 7 said elements to separate the members of the clutch when the shaft will have made a first means incapable of operating'the shaft 7 ported by the cam and allowed to gravitate as thecamrotates tocooperate with the secsubstantially half revolution, to render the further, and means to return the first means 7 to 1ts-1n1t1al position, and means to with" 0nd element to prevent an overthrow'of the" V shaft. v

r '23. In combination, a switch, having la switch point, acasing, a revoluble shaft mounted in said casing having an eccentric and rod connection with the switch point, a clutch connected to said shaft, a device to be actuated by a member on a car, means connecting said device and said clutch, an element on said shaft, and means actuated by said element to open the clutch when the shaft will have made a substantially half revolution, to render the first means incapable of operating the shaft further.

24:. In combination, a switch having a switch point, a casing, a revoluble shaft mounted in said casing having an eccentric and rod connection with theswitch point, a clutch comprising two members, gears connecting one of the members of the clutch and said shaft, a device to be actuated by a member on a car, means connecting said device and the other members of the clutch, an element on said shaft, and means actuated by said element to separate the members of the clutch when the shaft will have made a substantially half revolution, to render the first means incapable of further operating the shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES S. EPPLEY.

Witnesses:

MICHAEL L. GRoss, FRANK B. SEEMAN.

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

